Technology Advisor
Expert in cryptography, cryptographic protocols, blockchain, information security and privacy protection, international standardization.

  • Aspects of specialties: Research scientist in cryptography, its applications, and privacy; Expert in international standardization.
  • A research professor of computer science at Georgetown University and Director of Blockchain research at CyberSMART Research Canter, where he leads multi-disciplinary research among technology, economy, law, and regulation.
  • Deeply involved in blockchain academic research: Co-founder of “” building an international neutral academic research test network; Research on security analysis on blockchain technology; Co-chair of Blockchain Governance Initiative Network (BGIN); Committed to ISO TC307 standardization as a committee member and liaison between ISO/IEC JTC1 SC27 and ISO TC307. A member of OECD’s Blockchain Expert Policy Advisory Board (BEPAB).
  • Designed cryptographic protocols from fundamental protocols to application protocols: Key management protocols suitable for smartphone and RFID tags; Digital cash schemes; Cryptocurrency and blockchain technology; Digital time-stamping schemes based on PKI and hash-chain; Digital voting schemes; Privacy-enhancing technologies including anonymous digital signature and anonymous entity authentication protocols.
  • Expert in international standardization of cryptography and information security: Head of Japanese national body of ISO/IEC SC27/WG2; Editor of ISO/IEC 29128 (Verification of Cryptographic Protocols), ISO/IEC 20009-2 (Anonymous Entity Authentication), ISO/IEC 19592 (Secret Sharing Scheme) and Standing Document 4 (Analysis and status of cryptographic algorithms); Editor of ISO TR23576 (Security of Digital Assets Custodians); Member of Japanese Governmental committees for cryptographic technologies; Founder of an international consortium on security evaluation of cryptographic protocols, “CELLOS.”; Proposer of new evaluation criteria of hash functions suitable for real information system and a common evaluation platform for SHA-3 candidates, conducting an evaluation for 14 finalists.

Work Experience – Highlights
  • Blockchain Governance Initiative Network (BGIN), Acting Co-chair
  • Virginia Tech, Research Professor
  • Georgetown University, Research Professor
  • NTT Research Inc., Head of Blockchain Research
  • Keio University, Project professor
  • MIT Media Lab, Research Affiliate – Director’s Liaison for Financial Cryptography
  • University of Tokyo, Research Fellow
  • ISO/IEC JTC1 SC27/WG2, Head of Japanese National Committee
  • National Institute of Information and Communications Technology (NICT), Director of Security Architecture Laboratory
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